Standard electric lamp.



G. T. IRWIN.

STANDARD ELECTRIC LAMP. APPLICATION man Nov. 6, 1916.

Patented Oct. 16, 1917.

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UVVE/VTOR GLORGZ. 7f /RW//V enonen THOMAS IRWIN, arrest-titre, 'onrAzeio, cannon.

sranmnn unscrew LAMP.

Specification Letters Patent.

Patented Oct. 16, 1917.

Application fild November c, 1916. Se ial so. 129.823.

To all whom it may concern:

Be it known that I, Gnonen THOMAS IRWIN, of the city of Toronto, in the county of York, in the Province of Ontario Canada, have in vented certain new and useful Improvements in Standard Electric Lamps, ofwhich the following is the specification.

My invention relates to improvements in standard electric lamps and the Object of the invention is to devise means whereby a lamp bulb and shade may be adjusted to any desired position convenient to the user and such as will be simple and cheap to manufacture and it consists essentially of a standard extending upwardly from a suitable base, a cross arm supported upon the base so as to swing in a horizontal plane on a center located on a line with the longitudinal axis of the standard, a telescopic extension mem her to the arm. means for suspending. the lamp bulb and shade from the extension arm, a counterweight for the lamp. means for controlling the lamp suspension means so as to retain the lamp in any position-to which it may be v adjusted vertically, and means for supporting the lamp and shade on the suspension means so as to be capable of being adjustably swung ina vertical plane as hereinafter more particularly explained by the following specification.

Figure 1, is a general perspective view of my lamp with the main shade removed and the standard intermediately broken away otits length Fig. 2, is an enlarged vertical sectional detail through the lamp standard and lamp supporting parts.

Fig. 3, is an enlarged view of the upper portion of the lamp showing the main shade in position.

Fig. e, is a sectional detail showing the means of adjustably supporting an incandescent light from the flexible suspension means so as to be adjusted in a vertical plane.

Fig. 5, is an enlarged sectional detail of the main casting and adjacent parts employed in the construction shown in Fig. 4.

Fig. 6, is a perspective detail showing the means for pivotally supporting the cross arm and bracing the same.

Fig. 7, is a longitudinal section through the inner end of the cross arm and its pivot support.

Fig. 8. is a cross sectional view on line :0y Fig. 7.

Figs. 9 and 10 are perspective details of the parts for supporting the arm on which the leading-in wire is supported. 7

Fig. 11, is a sectional detail of the adjustable weight carried by the flexible connecting wire leading to the hanging incandescent lamp.

Fig. 12, is a plan section on line .703 v Fig. 2.

Fig. 13, is a plan section on line w y Fig. 2.

In the drawings like letters of reference indicate corresponding parts in each figure.

1 indicates the main standard which is supported on a base 2 which comprises the main socket casting 3 into which the lower end of the standard 1 extends, the lower end of such standard being preferably provided with an enlargement at fitting into a corresponding enlargement t in the casting 3. 5 indicates radially extending inverted U- shaped members extending from the casting 3 the sides of such members depending beneath the lower end of the enlargement l of the standard 1. 6, 7, 8 and 9 indicate feetwhich fit at their inner ends into the radi-. ally extending sockets 5 being secured therein by screws 10. The lower face of the inner end of each foot 6, 7, 8 and 9 is provided with a recess 11, the outer edge of which is concentric with the center of the standard. 12 indicates a circular plate fitting into such recess and forming a closure for the lower end of the hollow standard 1. 13 indicates an orifice formed in the center of the plate 12. 1% indicates a wooden plug which is driven up into the lower end of the hollow standard and against the lower end of which the plate 12 bears. 15 indicates screws which extend upwardly through the plate 12 into the plug 14. 16 indicates a cap which fits over the upper end of the standard 1 and is provided with a cylindrical upward extension 16*. The upper edge of the portion 16* is provided with a semicircular recess 16 17 indicates a cylindrical member surrounding the member 16 and turnably supported thereon, the lower end of the cylindrical portion 17 either bearing directly upon the upper face of the cap 16 or on suitable balls 18 interposed between the lower end of the portion 17 and the top of the cap 16, the low r end of the portion 17 being chamiered oii at its inner edge so as to form a runway for the balls. 19 indicates an arm extending radially out from the upper end of the portion 17, the arm 19 being provided at its outer end with an upwardly extending lug 20. 17" indicates a projection extending from the portion 17 into the recess 16". By this means the rotary movement of the member 17 is limited. 21 indicates a projection also extending from the upper end of the portion 17 in diametric alinement with the arm 19. 22 and 23 indicate curved arms extending from the upper end of the cylindrical portion 17 and located diametrically opposite each other in a position at right angles to the diametrically extending arm 19. The upper ends of the arms 22 and23 are provided with sleeve bearings 24: and 25 in which are suitably secured tubular members 26 and 27. 28 indicates an inverted U- shaped member provided with sleeve bearings 29 and 30 into which the upper ends of the tubular members 26 and 27 extend, such member being suitably secured therein.

31 indicates a standard extending upwardly from the center of the inverted U shaped member 28, at the upper end of which is supported a cluster light fixture 32 from which extends a plurality of sockets 33 designed to carry incandescent bulbs 3i. indicates a circular plate provided with 2. depending annular flange 36 which fits into the upper end of the cylindrical member 17. The plate is provided with a central orifice 37 from which extends a radial slot 38. 39 indicate lugs extending upwardly from the plate 36 at each side of the slot 38. and between which'is journaled the grooved pulley e0. 41 indicates a tube passing at its lower end through the orifice 13 of the plate 12 and at its upper end through the orifice 87 of the plate 35. The upper end of the tube %1 is preferably provided with an enlargement into which ts a hard rubber nipple i3 (see Fig. 2). The lower end of the tube L1 is provided with a collar or nut or other enlargement d4 secured thereto and fitting against the inner face of the plate 12.

The extreme lower end of the tube i1 is suitably threaded. 45 indicates a nut which is screwed on to the threaded lower end of the tube'atl against the plate 12. It will thus be seen that the tube 41 extends upwardly centrally through the plate 12, plug lat and centrally through the standard 1 and plate 35. 46 indicates a cylindrical weight fitting within the hollow standard 1 and providel with a central orifice '47 through which the tube 41 freely extends. By this means the weight 46 is held within the standard and centered so as to slide freely vertically. 48 indicates a cross arm. The cross arm 48 comprises an inner tubular member 49 and an outer tubular member 50. 51 indicates a plug which is secured in one end of the cylindrical member 1'9, such plug being provided with jaws 52extending to each side of the lug 20. 53 indicates a stirrup member, the arms ofwhich extend to each outer side of the gaw'52. 5st indicates a spin which extends through the arms of the stirrup 53, arms of the jaws 52 and lug 20 thereby forming a pivot on which the inner end of the tubular member d9 of the arm 48 swings.

55 indicates a guy ire secured at one end to the upper end of the stirrup 53 and. at the opposite end to a suitable portion of the inverted l.lcasting 28 hereinbefore re ferred to.

It will be readily understood that the tubular member 50 is freely held upon the tubular member 49 so as to slide telescopically longitudinally thereof. 56 indicates a collar which extends around the tubular member 50 in proximity to the plug 51. 57 indicates a hollow cylindrical portion depending from the collar 56. 58indicates a spring plunger held within the portion 57 so as to bear against the lower peripheral portion of the tubular member i9. 59 indicates an orifice formed in the tubular member 50 diametrically opposite the plunger 58. 60 indicates a ball fitting in the orifice 59 and bearing against the upper peripheral portion of the clindrical member 49. By means of the ball 60 and plunger 58 free sliding movement is allowed within the ey lindrical member 50 of the cylindrical member 49 but at the same time provides suflicient pressure upon the cylindrical member 19 as to prevent any inadvertent slidable movement of the cllindrical member 50 upon the member 49. 61 indicates a. lug which extends outwardly from the plate 35 being provided with an orifice 62. 63 indicates a fork provided with a stem 64: extending through the orifice 62 and through an alined orifice formed in the projection 21., The stem 6 1 is secured in position by a suitable nut 65 screwed on to the lower end of the stem. The center of the fork 63 is provided with a notch 66 for a purpose which will hereinafter appear. 67 indicates a shoe provided with a grooved edge 68. r 69 indicates a pulley, the sheaf 7 O of which is provided with a stem 71 extending diametrically through the cylindricalmember 50 being secured therein by a suitable nut 73. 74c indicates a similar pulley mounted upon the other side of the shoe 67. the sheaf of which is provided with a ring 7 5 surrounding the cylindrical member 50 and suitably secured thereto. T he shoe 67 is secured to a strap 76 which is suitably secured to the cylindrical member 50. 7 7 indicates a chain which extends up over the pulley 69 longitudinally the upper end of the cylindrical member 17, Cylindrical portion "16" of'the cap 16 and through the standard l to the weight 46 to which itis suitably secured adj'acentto the center tube ll. 78 indicates a swivel member to which the opposite end o'f-the chain 77 is secured, such swivel member being provided with an eye'79 having an inverted V-shaped portion 80 in the lower portion of its interior periphery. 81 indicates a lamp socket of any suitable construct-ion carrying an incandescentbulb 82 and shade 83. 81 indicates a casting comprising a substantially hollow spherical portion 85 from which extends an externally threaded nipple 86-which is screwed into the upper end of the socketSl. 87 indicates a hook member extending from the sphericalportion 8 at right angles to the nipple 86, the inner edge of the upper portion ofthe hook being provided with a serratedportion SS. 89 indicates a strip of band metal forming a lever and provided with an orifice 90 through which the nipple 80 extends thus firmly securing the upper end of the metal band 89 between the spherical portion 85 and the upper end of the lamp socket 81. The band 89 depends downwardly through the open upper end of the lamp shade 83 and through the lamp shade free thereof so as to project at its lower end past the lower edge of the lamp shade and is provided with a counterweight S9. 91 indicates a. chain secured at one end to the extreme end of the hook 87 and atthe opposite endto the lower end ofthe metalband strip 89, such lower end being preferably provided with a perforation through which a hook secured to the lower end of the chain 91 is passed thereby detachably securing the lower end of the chain 91 to the band strip 89. The chain 91 as it passes from the hook 87 to the band strip 89 passes through the ring 7 9 and the links of the chain engage with the inverted V-portion 80 which bites the chain 91 between'the links so as to hold the chain in any desired position to which it may be adjusted. 93 indicates a tubular arm provided with a threaded inner end screwed into an orifice 94: formed in the hollow spherical portion 85 of the casting 8 1. By means of this tubular arm the lead wires 94 ofthe lamp are conducted into the spherical portion 85 through the nipple 86 into the lamp socket -81 to be secured therein inthc usual manner. 95 indicates a pulley carriedby the inverted U-shape casting 28. 95* indicates a chain passing over the pulley 95. 96 indicates a ring secured to one end of the chain 95 and surrounding the cylindrical member 50. The oppositeend of the chain 95 is also provided with a finger ring 97 designed toengage (Vllh the hook 9S whenthe ring 97 is in the lowermost position. .99 indicates a counterweight carried by the chain 95* serving to counterbalance the weight of the arm 48 and thereby minimizethe efiort in lifting the same.

100 indicates an electric wire connector of any suitable type to one member of which the lead wire 9% is secured. 101 and 102 indicate wires leading upwardly from the other member of the connector 100 through the tubular members 26 and 27. 103 inclicates the main lead wires which pass upwardly through the tube e1 passing through the upper end thereof and outwardly through an opening 1041 oblong in shape so as to prevent the insulations of the wire coming in rubbing contact with the side of the opening and thus wearing off the insulations from which point they branch upwardly and also pass through the tubular members 26 and 27. The upper ends of the wires 103 pass through perforations 104C and 105 formed in the inverted U-casting 28 and from thence upwardlythrough the tubular standard 31 to the cluster light fixture 32 or such wire may be carried upward to the cluster in any other direction desired. The wires'101 and 102 are connected to the wire 103 at any suitable point so as to form a circuit passing through the lamp 82. 105 indicates a counterweight for the lamp 82. Such counterwei ht is supported by a sheaf pulley 106 of insulating material, the sheaf of thepulley comprising two circular members 107 and 108, the member 108 being provided with an internally threaded recess 109 and the member 107 with an externally threaded stem 110 which is threaded into the recess 109 so as to hold the sheaf members 107 and 108 a definite distance apart and on which the pulley member 111 is rotatably mounted. The lower portions of the members 107 and 108 are provided with eyes 112 and 113 from which extends a flexible connection 11% by which the counterweight 105 is suitably supported. The weight 105 bearing upon the wire 9% exerts a down ward pull on the portion 93 which exerts a leverage on the lamp preventing it swaying sidewise when tipped to an angle in a vertical plane. 115 indicates a collar rotatably mounted around the cylindrical portion 16*. The collar 115 is provided with a radially extending lug 116 provided with a vertical orifice 117. 118 indicates a hook provided with a vertically extending rectangular lug 119 designed to fit into an orifice 117. 120

indicates a rod secured in the hook 118 and extending therefrom in an upwardly curved direction, the upper end of the arm being provided with a crotch 121 serving as a support for the leading-in wires'of the lamp when it is desired to hold such wires clear of the ground at a point adjacent to the lamp. 122 indicates an ordinary main lamp shade which is suitably hung upon the top of the cluster fixture 32 by guy wires 133 or by any other suitable means found desirable.

Having described the principal parts involved in my invention 1 vill briefly de scribe the operation of the same.

ll hen itis desired to lower the lamp 82- all that it is necessary to do to pull upon the socket 81 when the chain 77 will slip longitudinally through the groove 68 of the shoe 67. As soon as the desired position reached and the lamp released, the weight of the lamp on one end of the chain and the weight of the counterweight l?) upon the opposite end serves to bind the chain in the groove 68 of the shoe 67 and thereby prevent the chain inadvertently slipping.

"When is desired to raise the incandescent light 82 vertically all that it is necessary to do is to grip the socket 81 and lift it upwardly thereby relieving the tension of the chain passing around the shoe 67. The chain so relieved is then drawn inwardly by the weight lli.

It will be readily understood, of course, that the lamp can be turned circumferentially a quarter turn in ither direction around the main standard 1 to any desired position, the cylindrical member 17 turns ing upon the cylindrical member 16*.

Vi hen it is desired to adjust the lamp 82 in a vertical plane so 9.5m direct the light rays of the lamp more or less in an upward or downward direction all that it is necessary to do is to lift the chain 91 and pass it either in one direction or the other through the ring 79 until the desired position is reached. The chain is then dropped so as to again reengage with the portion 80, such portion 80 being V-shape forming a sharp inclined bend in the chain preventing it slipping either in one direction or the other.

If it is desired that the lamp 81 be in the vertical position as shown in Fig. 1 the hook S7 is passed through the ring 79 so that the portion 80 engages with the serrations 88. The serrations 88 are provided so that this supporting device may bereadily adapted to any size of shade as, of course, the larger the shade the more off center the lamp would hang it some lateral adjustment were not provided for. By adjusting the hook 87 laterally through the ring 79 the center of the shade may be brought directly beneath the center of the ring and thereby insure that the lamp is hung in its true vertical position.

When it is desired to use the lamp for ordinary lighting purposes and not as a read ing lamp I draw the ring 97 downwardly so as to engage such ring with the hook 98. When in this position the lamp supporting arm 48 is drawn up into the inclined position shown by dotted lines in Fig. 3 thereby carrying the lamp 82 into a position substantially centrally of the shade and centrally beneath the cluster lights 3&. In this position the lamp willhave the appearance which will be easily adjusted to any desired position either vertically, circumferentially a horizontal plane or clrcumferentially 1n a vertical plane so as to direct the light rays; in any desired upward and downward d1- rection and at the same time I have provided lamp, all the operative parts of which may be hidden beneath the ordinary ,main lamp shade when it is desired to use the lamp for ordinary lighting purposes and not as a reading lamp.

lVhat I claim as my invention is:

1. In an electric lamp, a mainstandard,

,an arm extending diametrically of the main standard and supported to turn in a hori- Zontal plane on a center in a line with the axis of the main standard, a telescopic member car 'ied by the arm, lamp suspension means carried by such telescopic mem her, and a spring pressed friction member carried by the telescopic member and bearing against the arm.

2. In an electric lamp, a main standard, an arm extending diametrically ofthe main standard and supported to turn in a hor zontal plane on a center in a line with the axis of the main standard, atelescopic member carried by the arm, lamp suspension means carried by such telescopic memher, a spring pressed friction member carried by the telescopic member and bearing against the arm, and an anti-friction memher also carried by the telescopic member and bearing against the arm at a. point diametrically opposite to the spring pressed friction member. s

3. In an electric lamp, a main standard, a lamp supporting arm extending diametrically of the main standard and turnable in a horizontal plane on a center in a line with the aXis of the main standard, a telescopic member supported upon the lamp support ing arm and having an interior diameter greater than the exterior diameter of the lamp supporting arm, an orifice formed in the telescopic member, a, bearing ball held within such orifice so that its lower peripheral portion depends into the interior of the telescopic member and against the lamp supporting arm, and a spring pressed friction member located diametrically opposite the bearing ball and carried by the telescopic member. v

e. In an electric lamp, a main. standard, an arm extending radially from the main standard, a lamp supporting arm extending diametrically of the main standard and pivotally mounted at its outer end on the radial. arm, flexible lamp suspension means depending from the outer end of the arm, a standard support extending from the main standard above the arm, a pulley carried thereby, a chain passing over such pulley and supporting the lamp supporting arm at one end and designed to be manually 0perated at the opposite end.

5. In an electric lamp,a main standard, an arm extending radially from the main standard, a lamp supporting arm extending'diametrically of the main standard and pivotally mounted at its outer end on the radial arm, flexible lamp suspension means depending from the outer end of the arm, a standard support extending from the main standard above the arm, a pulley carried thereby, a chain passing over such pulley and supporting a lamp supporting armat one end and designed to be manually operated at the oppositeend, and a hook carried by the main standard with which the free end of the depending chain is designed to engage when the lamp supporting arm is raised to its uppermostposition.

6. In an electric lamp, a mainstandard, an arm extending radially from the main standard, a lamp supporting arm extending diametrically of the main standard and pivotally mounted at its outer end on the radial arm, flexible lamp suspension means depending from the outer end of the arm, a standard support extending 'fromathemain standard above the arm, a pulley carried thereby, a chain passing over such pulley and supporting a lamp supporting arm at one end and designed to be manually operated at the opposite end, and acounterweight for the arm carried by the chain.

7; In an electric "lamp, a main standard, an arm extending radially from the main standard, a lamp supporting arm extending diametrically of the main standard and pivotally mounted at its outer end on the radial arm, flexible lamp suspension means depending from the outer end of the arm, a standard support extending from the main standard above the arm, a pulley carried thereby, a chain passing over such pulley, a ring carried by the lower end of the chain and extending freely around the lamp supporting arm, and a counterweight carried by the chain on the opposite side of the pulley.

8. In an electric lamp, a hollow main cylindrical standard supported on a suitable base, a guide member extending centrally longitudinally of the hollow standard, alamp supporting arm carried by the upper end of the standard and extending radially thereof, flexible lamp suspension means carried by the lamp supporting arm and adapted to support a lamp at one end and to extend at its opposite end longitudinally through the hollow standard, and a counterweight fitting within the hollow standard and through which the guide member freely extends and to which, the end of the flexible lamp supporting member is secured.

9. In an electric lamp, a main hollow cylindrical standard, asuitable base for the standard, a tube extending centrally longitudina-lly through the standard, a plate encircling each end of the tube, one plate bearing against the upper end of the standard and the other plate bearing against the lower face of the base, means carried by the standard for suspending alamp exteriorly of the standard, and acounterweight for such lamp fitting within the standard and through which the central tube freely extends.

10. In an electric lamp, a hollow standard adapted to carry lamp suspension means at its upper end, a cylindrical member surrounding the lower end of the standard and having radially inverted U-shape socket portions, radial feet fitting within such socket portions, a cylindrical member ex tending centrally through the main stand ard and depending through the lower end thereof, a plate surrounding such depending end and bearing against the inner ends of the radial feet, means for securing the feet within the Ushaped socketportions, and means for drawing the plate surrounding the central cylindrical member upwardly against the inner ends of. the feet.

11. In an electric lamp, a hollow main standard adapted to carry lamp supporting means at its upper end, acylindrical membersurrounding the lowerend of'the base and having radially extending inverted U shaped socket portions, a plug secured withinthe lower end of thehollow standard and depending from the lower end thereof, radial feet fitting within the inverted U shaped socket portions and bearing at their inner ends against the plug, and a plate secured to such plug and extending over the shaped socket portions, a plug secured within the lower end of the hollow standard and depending from the lower end thereof, radial feet fitting within the inverted U- shaped socket portions and hearing at their inner ends against the plug, a plate secured to such plug and extending over the inner ends of the radially extending feet, means for securing the feet within the inverted U- shaped socket portions, and a cylindrical member extending centrally through the plate and plug, a securing nut screwed on to the lower end of the cylindrical member against the plate, and means for securing theupper end of the cylindrical member in the upper end of thehollow standard.

13. In an electric lamp, a main standard, an arm extending radially from the upper end of the main standard having an upwardly extending lug at its upper end, a lamp supporting arm pivoted at one end of the lug and extending therefrom diametrically'of the main standard, a fork carried by the main standard at the diametrically opposite side to the radial arm and in which the lamp supporting arm rests, and lamp suspension means carried by the outer end of the lamp supporting arm.

lat. In an electric lan1p,a suspending support for the lamp provided with the usual lamp socket and shade, a lever arm connected to the top of the socket and extending through the interior of the shade, a member extending upwardly from the lamp socket, a chain connected at one end to such member and at the opposite end to the lever arm protruding through the bottom of the shade, and a ring carriedby thesuspending member through which the chain passes. V 7

15. In an electric lamp, a suspending support for the lamp provided with the usual lampsocket and shade, a lever arm connected to the top of the socket and extending through the interior of the shade and carrying a suitable counterweight, a memberextending upwardly from the lamp socket, a chain connected at one end to such memher and at the opposite end to the lever arm protruding through the bottom of the shade,

and a ring carried by the s'uspending'memher through which the chain passes.

16. In an electric lamp,.a mainstandard, a lamp supporting arm carried by the main standardextending at right angles thereto, lamp suspension means depending from the cross arm, a lamp socket, a hollow extension to the upper end of the lamp socket, a tubular member extending outwardly from such hollow member and through which the lead wires of the lamp extend and pass in a downwardly looped form to the main standard, a sheaf carried by the loop of the lead wire, and a counter-weight depending from such sheaf. V

17. In a lamp of the class described, a central standard member, a sleeve fitting freely on to such standard member, a shoulder formed on such standard member-and on which the bottom end of the sleeve bears, an arm having a crotched upper end, and a detachable connection between such arm and the turnable sleeve.

18. In a lamp of the class described, a central standard member, a sleeve fitting freely on to such standard member, a shoulder formed on such standard member and on which the bottom end of the sleeve bears, an arm having a crotched upper end, a hook member forming the lower end of the arm having a flat sided projection, and a lug extending from the turnable sleeve into which the flat sided projection fits.

I chosen THOMAS IRWIN. Witnesses 7M. EGAN, Miss MoMAcKoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

